Analyze or strip unwanted audio/subtitle tracks from MKV files to save space. Works on single file or entire folder (batch). action=
AI agents use optimize_media to create or update resources in Mediabox MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mediabox MCP environment.
The tool modifies media files by removing tracks, which is a Write operation (reversible data modification). Severity is medium because: (1) the changes are theoretically reversible if backups exist, (2) blast radius is limited to media library files rather than system-wide, but (3) an AI agent could mistakenly strip important language tracks or audio from user collections.
From the tool's definition Tool description states it will 'strip unwanted audio/subtitle tracks from MKV files' and 'Works on single file or entire folder (batch)' — these are modification operations that alter media files.
Risk signalsBulk/mass operation — affects multiple targets
Documented attack patterns abuse exactly the kind of access optimize_media gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mediabox MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for optimize_media:
{
"version": "1",
"default": "deny",
"tools": {
"optimize_media": {
"limits": [
{
"counter": "optimize_media_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}optimize_media stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Analyze or strip unwanted audio/subtitle tracks from MKV files to save space. Works on single file or entire folder (batch). action=. It is categorised as a Write tool in the Mediabox MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mediabox MCP server in PolicyLayer and add a rule for optimize_media: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Mediabox MCP. Nothing to install.
optimize_media is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the optimize_media rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for optimize_media. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
optimize_media is provided by the Mediabox MCP server (juancmpdev/mediabox-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mediabox MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
30 Mediabox MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.